Vango sleeping bag cotton liner square the vango cotton liner square is a liner for square shaped sleeping bags that will save you the hassle of washing your sleeping bag on the road prolong its life and is made from 100 cotton why waste time when away in the outdoors struggling to wash and dry a full sleeping bag its much easier to wash and dry a lightweight liner now and again especially if youre cleaning up after mucky kids specifications 100 cotton soft against the skin weigh